/*
 * Copyright 2009 Michael Chermside
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.mcherm.zithiacharsheet.client.modeler;


/**
 * A CalculatedIntValue which just adds up some ObservableInt values. The set
 * of values to add must not change.
 */
public class SumOfIntsValue extends CalculatedIntValue<ObservableInt> {
    
    public static class SumValueCalculator implements ValueCalculator<ObservableInt> {
        public int calculateValue(Iterable<? extends ObservableInt> inputs) {
            int result = 0;
            for (ObservableInt input : inputs) {
                result += input.getValue();
            }
            return result;
        }
    }
    
    public static SumValueCalculator sumValueCalculatorInstance = new SumValueCalculator();

    public SumOfIntsValue(Iterable<? extends ObservableInt> inputs) {
        super(inputs, sumValueCalculatorInstance);
    }

}
